Type-writing machine.



A. G. F. KUROWSKI. TYPE WRITING MACHINE.

APPLICATION FILED MAY 3, 1913. 1 071 439 Patented Aug. 26, 1913.

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' the proper relation of the rollers, and the ing mechanism which willmaintainaccuand at the rear by two sets of bearing rollers, one locatedbehind the platen, and=the on an inclined mg surfaces is controlled by.means of a:

- of Kings and State of New York, have incured respectively to themachine 'frame and the platen," the front and-rear rollers serva ing tomaintain the horizontal 'tio applied to an Underwood typew g UNITEDsrnrns rngmvr orrion.

ALFRED G. F. KUROWSKI, 0F BROOKLYN, NEW YORK, ASSIGNOR T0 UNDERWOODTYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Application filed may :2, 913. Seria1Ho.765,223. i

To all whom it may concern Be it known that I, ALFRED G. F. KUROW- SKI,a citizen of thd United States, residing in the borough of Brooklyn, inthe county vented certain new and useful Improvements in Hype-WritingMachines, of which the followingis a specification.

My invention relates to an improved roller bearing mechanism for thepaper carriage of a typewriting machine.

An object of the invention is to provide, an improved formandarrangement of bearrate alinement and guiding of the carria e andprevent jumping or displacement of t e carriage due to the shifting ofthe platen, or from other causes. p

The carriage is supported at the front by a roller running on astationary guide rail other below and somewhat to the rear of the platenaxle. The 'two sets of rollers run in ways comprising bearing surfacesformed ame connected to the carriageframe, and opposite surfaces formedon stationary guide rails on the machine frame. The two sets ofrollersare mounted in 'a light frame orcarrier which maintains 5 position ofsaid carrier relative to-the bear pinion on the carrier meshing withracks se- 3 the bearing frame on the carriage, The bear- F ing rollorsare arranged in pairs, oneroller of each pair'having its axisperpendicular to the-other roller. The rollers and-their bearingsurfaces at the rear of the platen zontal direction. The weight of thepaper carriage and the parts supported thereby-i comes prinoipallyuponthe rollers beneath position of the carriage and prevent any tiltingthereof about the lower rollers as a fijil'crum. 7

Other objects and advantages will hereinafter appear. I

In the accompanying drawings, Figure 1. is a sectional e evation view ofmy ;invenmachine. Fig. 2 is a.'sectional view as 51131- cated by theline wa: on Fig. 1. Fig. 3 is a. fragmentary view showing the bearingrollers and their carrier.

mechanism.

1 At the front of the frame 3 is a roller 8 which runs on a stationarycarriage rail 9 on the machine frame 10. At the rear of the carriageframe isa set of bearing roll- "ers arranged in pairs, each paircomprising rollers 11 and 12, the rollers 11 being substantiallyperpendicular to the rollers 12. Beneath the platen and somewhat to therear of the platen axle is a similar set of rollers comprising pairs ofrollers13 and 14 perpendicular'to each other. The rollers are adapted torun on a rectangular bearing frame 15 rigidly secured to the papercarriage and comprising upper and lower guide rails 16 and 17respectively, connected by pins 18.

v Each of the rails 16 and 17 is substantially in the form ofan angleiron, providing bearingsurfaces at right angles to "each other for thebearing rollers. The upper rail 16 thus forms bearing surfaces 19 and 20for the rollers 12 and 11 respectively; The lower rail 17 likewiseprovides bearing surfaces 21 and 22 for the rollers 14 and 13respectively.- Opposite these bearing surfaces are correspondingsurfaces formed on stationary guide rails 23 iand 24, fixed 1 toorforming part of-the machine frame. I

The lower guide rail 23 thus provids bean ing surfaces '25 and 26parallel respectively with the surfacesg22 and 21. The upper rail 24provides bearing surfaces 27 and 28 parallel with spectively. 1 e

Thebearing rollers are held in proper relation by means'of a light frameor carrier icomprismg longitudinal bars 29 connected a central cross bar30. This carrier is preferably made from a single-piece of sheetmaterialand comprises ears 31'bent .lip to HQ i1 fem-hearingsin whichlthe pivptpins the'surfaces 19 and 20 re- 32'are secured. The rollers areprevented from creeping or displacement in the direction of the carriagetravel by means of a pinion 33 connected to said carrier and meshingwith racks 34 and 35 secured respectively to the machine frame and theframe 15 on the carriage. The pinion 33-is j ournaled on a shoulderedscrew 36 threaded into the cross bar 30 of the carrier. The rack 34k maybe adjustably connected to the rail 24 by screws 37 engaging thebifurcated ends of the rack.

It will be observed that the bearing frame 15 is inclined at an angle ofabout forty-five degrees to the vertical, and is so positioned that theupper rollers 11 and 12 are behind the platen and approximately in thehorizontal plane of the platen axle, while the lower rollers 13 and 14.are approximately in the vertical plane of said axle. It will further benoted that the rollers 11 are not parallel with the frame 1?, but aremore nearly vertical, and the rollers 12 approximate a horizontalposition. The bearing surface 28 for the rollers 11 also approaches thehorizontal position, and ,is approximately parallel to a plane passingthrough the front rollers 8 and the rear rollers 11. As a result of thisarrangement, any tendency of the rear end of the carriage to be liftedvertically, or of the carriage to be tilted about its bearing S'as afulcrum, is

prevented by the bearing surface 28 which is directly opposed to suchmovement. Any tendency also of the carriage to be shifted eitherforwardly or rearwardly is likewise squarely opposed by theapproximately perpendicular bearing surfaces 19 and 27. Also the axes ofthe lower rollers 13 and 1 4 are not normal to the plane of the frame15, the rollers-13 approaching a horizontal position and the rollers 14a vertical position.

'The rollers 14 carry most of the weight of the paper carriage, and itis desirable that the bearing surfaces 21 and 26 should be approximatelyhorizontal, so that the weight 'on the bearing surfaces will be moredirect.

The bearing surfaces 22 and 25, being approximately vertical, are inposition to effectively opptjse any play of the carriage in a forward orrearward direction.

It will thus be seen that all of the roller bearings and their bearingsurfaces are so arranged and disposed that they will cooperate toeffectively prevent any.material p nyof the carriage either in avertical or mrizontal direction, and also to prevent any tilting of thecarriage. It is also found that by arranging the rollers and theirbearing surfaces substantially normal to, rat-her than at aennsiderableangle to the directions in which pressure thereon is applied, friction,wear, and lost motion are reduced, and a smoother running of the carnageis secured.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting madhine, the combination with a traveling carriage,of an inclinedbearing frame securedthereto having hearing rollersbeneath the platen,,and ways for said rollers formed by bearing surfaceson the carriage and the machine frame respectively.

3. In a typewritingmachine, the combination with a traveling carriage,of a platen thereon, bearing roller in front of the platen, bearingrollers in rear of the platen, the axes of said lastnamed rollers beingsubstantially parallel with a plane passing through said front and rearrollers, and Ways for said rear rollers comprising bearing surfacesparallel with said axes.

4. In a typewriting machine, the combination with a traveling carriageand a platen thereon, of bearing rollers, an inclined carrier supportingsaid rollers, the axes of said rollers being inclined to the plane ofsaid carrier, and bearings for said nation with a carriage platenthereon,

of an inclined roller bearing frame on the carriage in rear of theplaten axle, bearing rollers interposed between said frame and themachine frame, and means in front of the platen for supporting andguiding the front of the carriage.

ALFRED Gr. F. KUROVVSKI.

Witnesses F. E.. ALEXANDER, Trrus H. IRoNs.

depict of this patent may he obtained for five cents each, by addressingthe Commissioner of Patents.

Water an, r. c."

